Detector-rod support



Jam, 20. 1925.

V. I... CHAMBERLIN DETECTOR ROD SUPPORT Filed Feb. 1, 1924 M IVENTOR.

VIE/V z C/YAMJEZZ/A/ {Z04 f/m ATTORNEY.

Patented Jan. 20, 1925,

' N1lT?E D s i i ea sessaln air-re r 0 irorrre im se sw,

nnrnoron-non sUrPonr,

Application filed February igain have invented a certain new-..ancb user,

tul; Improvement in Detectonltod Supports, and; declare-the-dfollowing to bee full, clear,

and exact description of the sa ne isuchas .i therod 5 thus securing the ball 6 rigidly in a position Theupper-end 9 otthe rod 55 is I more, particularlyin Fig, I

will enable others skilled in the .art .to which it pertains to make and use; tl1e ;-same, i refs;

erenee being had to the accompanying draws,

ings, which form a part of thisspecification.

This invention relates to detectorrod supports 'for crystal detectors andthe object-of :3 the invention l is toprovide a detectorrod sup a port which allo'ws rotation of the rodxas Well as movement thereof in any direction so that the detector wire-carried by the rodmay be appliedsto 'anypoint on i the crystal. An other object of-t-heinvention is to provide a detector rodsupport by which theirod may be set in any desiredposition,-nieans beingw provided for holding the lOdlILfllG OSPltIOIL; Another ob ect ot the 111V6I1tl011..-;1S .to.

set; provide a detector rod support which is adapted for use with the usual types-of'crysr-i tal detectorsand in which-the detector rod is capablemf practically universalit -move: merit; Another object'- of thednventiomis to provide a double ballejoint comprisin a stationary ball on which atube-iis movable in any direction and a movablewloall inathez; opposite end of the tube whichwmayr; be i turned in any vdirectionrin the tube, the ,detector -rodbeing rotatablynmounted Lin the ball and movable longitudinally. there-a through and a spring beingiadapteditollOlCl-v the parts in; assembled relation with sufficient tension to prevent .accidentale movement of-the parts.- These;v objects and-the;

several novel features of the invention are hereinafter more fully: clainiedand the preferred form of construction by which these objects are attainediis shown--in; the accompanying drawings. in which-'- Fig.1 is-an elevation ota crystal detector showing the detector rod supportiin section.

Fig. 2 isa section taken =on.linei2.2 of Fig. 1.

Fig. 3 is an elevationillustrative ofthe' extent to which tllellGtBCtUPlOCl may be,

1noved-.-

As shown lIl F1g. 1 a base 1 1s provided of insnlatingamaterial andsupportmg feet described and] 1, 1924. i Serial i-Nou 689,968.-

2 are secured'to thebase l as: shown. Binding posts?) and aresecnredto the base-1 and a threaded rod- 5 extends:through vthe base- 1 and is threaded into a ballfi as shown in :Fig. 1. This threaded rod 5 extends downwardly through the base land through a brass strip ,7 secured itoithe bindingpost 3 and a nut 8 isthreaded ionto;the endiof flattened shown. 2 and. the end 10105511 coiled ispring 11 is hoolte d through an apertune proy-ided therefor in the-end 9 of the rod,5. The rodeo is,

adjusted so that theaperture-in the end 9 thereof ,is positioned at about the cent-er of :theuball G so thatthe tension; ofthe'spring ll is not ,Varied during[movement oitithe tube; 13 over the ballg fi. The ball 6 is Uprcmidedwwith a recess 12 sothat theatube 13which fits the face of the ball 6 may be movedthereover; without thezend (1O ofthe spring engaging the edgept the ball. A ball 1% is supported; in the upper vend of the tube 113 and may be moved about in the end of the tubeandithe ball liis'providedawith a recessl5- openito the interior-of thetube- 13; The detector i rodl6 extends through the ball l4 and recesslfi. and a hoolcl'? is secured to ,the coiled spring '11, and engages aoverwthe,detector rod ;16 the spring being -hunder lTQIlSlOllnllt this time ;to cause frictional,v engagement, betweensthe sparts and thus; prevent accidental nioveinent g-of the detector 5 rod, The detector rod, 16 is i provided with a knob l8hat oneiend and a detector tip -19 fits over the opposite en d ot the rod 16 and-carries a line detector wire or ..cat whiskeri 20.- This detectonwire 20 is adapted to be moved over acrystal 21 until a sensitive point is i found onthe crysj tal and the dergice is left in-positi01nas longv as the crystal point remainssensitive which lasts for a period ot three or four days. Thisdetector rod support niayizbeinsed with any suitable type of crystal .holderfand pref-V erably one in which several sidesot the crys taLare exposed. By means of the hoolz 17 and spring 11 rotation of-the rod 16 .onits Jongitudin'al axis "and? longitudinal more ment thereof is tfrictionally resisted so that the rod 16 may be turned or moyed longitudinally and will remain ,in the position to which it-is turned. Alsouby niez nsiotthe. spring ll the ball 14 held in frictional en gage nent with its seatin the end of the any position set.

tube 13 and the lower end of the tube 13 is held in frictional engagement with the stationary ball 6. By this construction the rod 16 may be rotated on its longitudinal axis may be moved longitudinally and may be turned in any direction on the ball 1e as a pivot and may also be turned on the ball 6 as a pivot as Will be understood from Fig. 3, the frictional engagement of the parts by the spring 11 holding the device in The tension of the spring 11 may be increased by unthreading the rod 5 from the ball 6 and then turning up the nut 8 to tightly secure the ball 6 to the base, and in a like manner the tension of the spring 11 may be decreased by threading the rod 5 further into the ball 6 thus inov- -ing the hook end toward the hook end parts and is of consequent Having thus 17. By this construction the detector wire 20 may be applied to all sides of the crystal 21' without removing the crystal from the holder. The valuable feature oi this invention is the fact that the detector rod and support will remain in any position set so that when the sensitive point on the crystal is found the detector wire will remain in contact with this point until it is intentionally moved. One of the disagreeable features of a great many supports oi this nature is the tendency tor the support to spring back slightly when released by the operator so that the point on the crystal is lost and must again be found, but this is entirely eliminated in the support shown and when a sensitive point is found the detector wire will remain in contact therewith as long as the point remains sensitive which is usually for a period of three or four days at a time after which the detector rod may be moved to find another sensitive point.

From the foregoing description it becomes evident that the device is very simple and efficient in operation, is composed of few low manufacturing cost, will not easily get out of order and will remain in the position set and provides a device which accomplishes the objects described.

fully described my invention, its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States is- 1. A detector rod support for crystal detectors comprising a base, a threaded rod extending through the base, a stationary ball. threaded onto the said rod, the ball being provided with a recess into which the end of the said rod extends, a tube open to the recess and provided with an end seating on the stationary ball and movable thereover, a movable ball seating in the upper end of the tube and provided with a recess open to the tube, a detector rod rotatably mounted in the movable ball and extending through the recess, and a coiled spring having one end engaging about the detector rod in the recess of the movable ball, the opposite end of the spring being secured to the end of the threaded rod in the recess of the stationary ball.

2. A detector rod support for crystal detectors con'iprising a base, a stationary ball secured to the base, a tube provided with an'end seating on the stationary ball and movable thereover, a movable ball seating in-the upper end of the tube and provided with a recess, a detector rod rotatably mounted in the movable ball and extending through the recess, a coiled spring having one end engaging about the detector rod in the recess of the movable ball, the opposite end of the spring being secured in the stationary ball, and means for adjusting the tension of the spring.

3. A detector rod support for crystal detectors comprising a base, a stationary ball secured to the base, a tube provided with an end seating on the stationary ball and movable thereover, a movable ball seating in the upper end of the tube and provided with a recess, a detector rod rotatably mounted in the movable ball and extending through the recess, the recess being open to the interior of the tube, a coiled spring having a hook.

end engaging over the detector rod within the recess, the opposite end of the spring being secured in the stationary ball, and a detector wire carried by the end of the detector rod.

4:. A detector rod support for crystal detectors comprising a base, a ball stationarily mounted on the base, a tube provided with an end seating on the ball, a ball seated in the upper end' or the tube and movable therein, a detector rod extending through the movable ball, a spring having one end engaging about the detector rod in the movable ball, the opposite end of the spring being secured in the stationary ball, and a detector wire'carried by the detector rod.

5. A detector rod support for crystal detectors comprising a base, a stationary ball secured to the base, a member seating on the stationaryball' and movable thereover, and a detector rod pivotally mounted in the upper end of the saidmember and rotatable therein.

6. A detector rod supportrtor crystal cletectors comprising a base, a ball stationarily mounted on the base, a member seating on the said ball and movable thereover, a second member pivotally mounted in the first named member, and a detector rod movable longitudinally through the said second member and rotatable therein.

fication. V

VERN L. CHAMBERLIN. 

